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Search: id:A050128
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A050128 a(n)=[ a(n-1)/2 ] if this is not among 0,a(1),...,a(n-1), else a(n)=2*n. +0
4
1, 4, 2, 8, 10, 5, 14, 7, 3, 20, 22, 11, 26, 13, 6, 32, 16, 36, 18, 9, 42, 21, 46, 23, 50, 25, 12, 56, 28, 60, 30, 15, 66, 33, 70, 35, 17, 76, 38, 19, 82, 41, 86, 43, 90, 45, 94, 47, 98, 49, 24, 104, 52, 108, 54, 27, 114, 57, 118, 59, 29, 124 (list; graph; listen)
OFFSET

1,2

COMMENT

Does this sequence contain every positive integer exactly once?

CROSSREFS

Cf. A050129, A050130, A050131, A050132.

Sequence in context: A143942 A125065 A109816 this_sequence A134042 A064821 A051239

Adjacent sequences: A050125 A050126 A050127 this_sequence A050129 A050130 A050131

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified December 16 13:01 EST 2009. Contains 170825 sequences.


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